Type-writing machine.



No. 699,389. Patented 'May 6, I902. H. JARVIS.

TYPE WRITING MACHINE.

(Application filed July 2, I901.)

(No Model.) 2 Sheets-Sheet l.

Patented May 6, I902.

H. JARVIS.

TYPE WRITING MACHINE.

A nmion filed July 2, 1901.

2 Sheets-Sheet 2.

(N0 Model.)

3 I S IN I Q n s v 6 g Q Q Hm M I as l/ Mb w H m: ncnms PLTERS co.wncm-uma, WASHINGTON. n. c,

UNITED STATES PATENT OFFICE.

HAROLD JARVIS, OF BUFFALO, NEW YORK, ASSIGNOR TO JARVIS TYPE- XVRITER doTABULATOR COMPANY, OF BUFFALO, NEW YORK.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 699,389, dated May 6,1902.

Application filed July 2, 1901.

To will whom, it may concern:

Be it known that I, HAROLD JARVIS, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented new and useful Improvements in Type-Writing Machines, of whichthe fol lowing is a specification.

This invention relates to type-writing machines having in addition tothe ordinary uniform feed or spacing mechanism for the paper-carriage asupplemental variable spacing mechanism which enables the carriage toskip a predetermined number of single spaces for tabulating'purposes orfor printing words or phrases as well as single-space characters.Machines of this kind are shown and described in Letters Patent of theUnited States, No. 536,588, granted to me March 26, 1895, and in anapplication for patent filed by H. M. Blakeslee and myself on the 1stday of February, 1901, Serial No. 45,625, to which patent andapplication reference is made fora full description of the variable feedand controlling devices of the paper-carriage. When the carriage skips anumber of spaces and is suddenly arrested by a rigid stop, the impactjars and strains the parts of the machine with greater or less severity,according to the distance that the carriage travels before beingstopped. To diminish the force of this shock, I have heretofore devisedan automatic governor which operates to check or retard the speed of thecarriage under the impulse of its feed-spring when the carriage isreleased from its escapement or feed mechanism. This governor isdescribed in the application for patent above referred to.

The object of my present invention is the provision of a simple andeffective governor or retarder for the carriage which is easilyapplicable to a typewriting or tabulatingmachine and which is so locatedas not to interfere with other parts of the machine or require arearrangement of the same.

In'the accompanying drawings, consisting of two sheets, Figure 1 is atop plan view of a type-writing machine with a tabulator attachmentprovided with my improved governor. Fig. 2 is a detached rear view ofthe governor. Fig. 3 is a vertical longitudinal section of the machinein line 3 3, Fig. 1. Fig.

fore referred to.

seal No. 66,860. (No model.)

4 is a fragmentary transverse vertical section in line 4 4, Fig. 1. Fig.5'is a fragmentary front view of the gear-rack of the paper-carriage,its escapemen t-pinion, and parts of the governor. Fig. 6 is a verticallongitudinal section of the governor mechanism in line 6 6, Fig. 1.

A is the frame of the machine, 13 the rear portion of the customarypaper-carriage, and B its vertically-swinging front portion ,whichcarries the platen Z).

The carriage is actuated by the usual springdrum, which is not shown inthe drawings, and controlled by an escapement or uniform feed mechanismof any suitable or well-known construction. In the construction shown inthe drawings the feed mechanism consists of a longitudinal shaft 0,journaled on the top frame of the machine and provided at its rear endwith a ratchet or escapement wheel 0 and at its front end with a pinion0 which meshes with a transverse gear-rack c mounted on the carriage andcapable of swinging or otherwise moving vertically thereon. The movementof the usual main keys Dis transmitted to the escapement-wheel c by anyordinary or suitable mechanism, which is not shown in the drawingsinasmuch as it forms no part of my invention. The devices for effectingthe necessary variable travel of the carriage for tabulating purposesalso form no part of my presentinvention and may be of any suitable orapproved construction for instance, like thatshown and described in mypendingapplication' for patent'hereinbe- My improved governor is hereinshown as applied to the tabulator attachment of said pendingapplication, and to better enable those skilled in the art to understandits relation to the tabulator the description of the governor willbeprefaced by a brief description of those parts of the tabulator withwhich the governor cooperates.

The tabulator attachment comprises lifting devices for raising thegearrack c of the carriage out of engagement 'w'iththe escapementpinion0 a series of auxiliary push-keys for actuating said lifting devices, anautomatic lock for holding the gear-rack in its inoperative positionduring the travel of the carriage, and automatic stop and trip devicesfor re leasing said lock and allowing the gear-rack to return intoengagement with the escapement-pinion 0 Referring to Figs. 1 and 3, Erepresents the auxiliary push-keys, mounted on the front end ofhorizontal rods 6, which extend from the front to the rear end of themachine and engage with the lower arms of vertical bellcrank levers e.These levers actuate an elbow-shaped universal frame F, which preferablyswings upon the same fulcrum as said levers. The lower rodfof this frameextends across the rear side of the series of bell-crank levers e, sothat upon pushing any one of the auxiliary keys E the universal frame isactuated through the medium of the corresponding bell-crank lever.

G, Fig. 1, is a verticallymovable frame or support arranged at-the topof the machine, preferably in rear of the usual type-bar basket, andcomposed of two parallel arms g, arranged transversely of the machineand connected at their front ends bya rod g and secured at their rearends to opposite ends of a rod 9 which rocks in a bearing g mounted onthe top frame of the machine. The free end of the frame Gr is raised bya verticallyswinging arm H, which engages under the adjacent rod g ofsaid frame and which in turn is elevated by a lever H, having its outerarm connected with the upper rod f of the universal frame F, so thatupon rocking this universal frame by the depression of an auxiliary keyE the frame G is raised through the lever H and the arm II. This arm Hand the lever H are pivoted to swing vertically on the top frame of themachine, and the lever is provided with a lateral pin h, which engagesunder the arm, as shown in Figs. 1 and 4.

Iis a driving-shaft carried by the verticallymovable frame G andpreferably journaled in a comparatively long bearing 6, mounted on saidframe, as shown in Figs. 1, 4, and 6. This shaft extends fore and aft ofthe machine and is provided at its front end with a pinionj, whichmeshes with the gear-rack c of the paper-carriage, as seen in Figs. 5and 6. By this construction the shaft I is geared with thepaper-carriage and rotated by the movement thereof, and the gear-rack ofthe carriage is lifted out of engagement with its escapement-pinion c bysaid shaft and the pinion j upon operating one of the auxiliary keys E.

k is a governor-shaft, preferably arranged above the plane of thedriving-shaft I and parallel therewith. This governor-shaft is supportedin a bearing or standard L, rising from the adjacent portion of theframe of the machine, and is provided at its front end with a pinion 7a,which is arranged to mesh with a gear-wheel m, secured to the rear endof the shaft I when the latter is in its elevated position, as .shown inFig. 6, and to clear said pinion when said shaft is in its loweredposition, as shown in Fig. 4. The governor-shaft 7a is provided at itsrear end with pivoted arms at, carrying governor weightsor. balls 02',which move outward by centrifugal force. The governor-arms n arearranged in a rearwardlyflaring cavity or socket n formed in the rearside of the standard L and impinge against the surrounding wall of saidsocket when thrown outward by centrifugal force. The arms thus act as afriction-brake, which retards the rotation of the governor-shaf t k andits driving-shaft I, causing the latter in turn to retard the speed ofthe paper carriage through the medium of the pinion and the gear-rack 0I The driviug shaft'I'and its carrying-frame G assume their depressedposition by gravity. If desired, this movement maybe aided by a spring.In the ordinary condition of the machine this driving-shaft is inits'lowered position out of gear with the centrifugal governor, as shownin Fig. 4. g

In the use of thetabulator upon depressing one of the auxiliary ortabulator keys E the gear-rack c is lifted out of engagement with itsescapement-pinion 0 as shown by dotted lines in Fig. 5, by the upwardmovement of the driving-shaft I, as hereinbefore described, and thisshaft is at the same time brought into gear with the governor-shaft lo,as shown in Fig. 6. The carriage is thus released and slid across themachine by the action of its customary spring; but as the automaticbrake or governor is set in motion at the moment that the carriage isreleased it opposes the action of said spring and checks the speed ofthe carriage, easing the shock at the end of the carriage-stroke andrelieving the machine from the wear and tear which would otherwiseresult.

It will be observed that although the driving-shaft I is moved into andout of gear with the governor-shaft 7c the driving-shaft rises and fallswith the gear-rack c of the papercarriage and always remains in geartherewith. I

The frame G is preferably provided with a lifting-shoe 0, which engagesagainst the under side of the gear-rack c and relieves the pinion j fromwear in lifting the rack.

By my improved construction and arrangement the. carriage-governor orspeed-retarder maybe located wholly in rear of the type-bar basket, asshown, Where it does not in any way interfere with the movement of thetypebars and where it can be readily applied and is convenient of accessfor repairs.

Although the centrifugal governor herein shown and described is adesirable one, I do not wish to be understood as limiting myself to theparticular construction disclosed, as

the same is susceptible of various inodifica tions coming within thespirit of my invention.

I claim as my invention 1. In a type-writing machine, the combinationwith a paper-carriage and a step-by-step feed mechanism therefor, thecarriage being IIO capable of disconnection from said feed mechanism,and a speed-governor comprising a governor-shaft, a driving-shaft fromwhich said governor-shaft is driven and which is movable into and out ofgear therewith, and gearing between the carriage and said drivingshaftfor rotating the latter by the movement of the carriage, substantiallyas set forth.

2. In a type-writing machine, the combination with a paper-carriagehaving a gear-rack, of a speed-governor comprising a governorshafthaving a pinion, and a driving-shaft movable toward and from saidgovernor-shaft and having gear-wheels arranged to engage with saidgear-rack and the pinion of the governor-shaft, substantially as setforth.

3. In a type-writing machine, the combination with .a paper-carriage, ofan escapement therefor, oneinember of which consists of avertically-movable gear-rack mounted on the carriage and capable ofengaging and leaving the other member, a governor-shaft, avertically-movable driving-shaft from which said governor-shaft isdriven and which is movable into and out of gear therewith, saiddrivingshaft having a pinion which engages with the toothed lower edgeof said gear-rack, substantially as set forth.

4. In a type-writing machine, the co1nbination with a paper carriage andan escapement therefor havinga pinion, of a verticallymovable gear-rackmounted on said carriage and capable of moving into and out of gear withsaid pinion, and a speed governor comprising a vertically-movabledriving-shaft geared with said gear-rack and having agearwheel, and agovernor-shaft arranged above said driving-shaft and having a pinionarranged to mesh with the gear-wheel thereof when the driving-shaft israised, and means for elevating said driving-shaft, substantially as setforth.

5. In a type-writing machine, the combina tion with a paper-carriagehaving feed mech anism from which it can be disconnected, of a HAROLD JARVIS;

Witnesses:

THEO. L. POPP, E. M. GRAHAM.

